Day-Glo

• Dayglo, day-glo, dayglo

Coined by the Day-Glo Color Corp., originally as a trademark, from day +‎ glow.

Day-Glo

1. A luminous paint that glows in a variety of brilliant colours, most commonly red or orange; used especially for outdoor advertising.
   • 1980, “Spring Collection”, in New Clear Days, performed by The Vapors:

     Cool shades and Day-Glo tears / All hide your sixteen years

• blacklight ink
• blacklight-reactive ink
• luminous paint
• fluorescent paint

Day-Glo (not comparable)

1. (colloquial) Very bright and luminous in colour.
   • 2011, Tim LaHaye, Jerry B. Jenkins, Glorious Appearing: The End of Days:

     Leon was in his most resplendent, gaudiest, Day-Glo getup, including a purple felt fez with multiple hangy-downs and a cranberry vestment with gold collar, appliquéd with every religious symbol known to man […]

   • 2022 April 20, Mariella Rudi, “Tostitos Hint of Lime has zero lime – but it’s still the perfect chip”, in The Guardian‎:

     The chip smells like nothing, but tastes like a smörgåsbord that’s both confusing and arousing, like Steve Buscemi. Flecks of spring green – the kind generated from radioactive waste – coat the unwieldy triangles. The seasoning is a kaleidoscope of Day-Glo dust particles that perishes under saliva and tongue.

• Lodyga